"From theme park enthusiasts trying to access the site to fans sneaking into the backend of our social media accounts to look for scheduled posts.

"So due to demand and interest in our largest investment to date we have released our next clue, The Victorian Twins."

Spooky: The girls were seen carrying a doll outside Oxford Circus station (Image: PA)

Construction on the new attraction has already begun and is shrouded in secrecy.

The company has, however, revealed that the footprint of the new experience will encompass 2,306 square metres and will involve a team of over 1,000 specialists from the resort's Magic Making Creative Department, as well as external experts.